A blockade is an act of war, but publically threatening it is also a quick way to lose sway in the court of world opinion. The Biden administration is pursuing a policy of ambiguity with respect to China.

Both that and pressure to host bases etc in exchange for secure access to US markets. There are many territorial disagreements. There is concern amongst countries in the area. These subs would do part of the job, with the bulk of it done by the USN.

Note the Australian nuclear submarines deal: They don't really want to protect their trade with om China, they want the ability to control trade between China and her allies. Likewise, China benefits from trade near her borders but the US and allies want the ability to turn off the spigot when they wish to force China into concessions, as has been noted in US geopolitical articles for decades now. 'Peace with Piracy' is just not compelling to the Iranians. The simplest way to get Iran to stop compandeering tankers is for the US to do the same. (Togo doesn't enforce their domestic law on the high seas, nor can they.) Iran violates US sanctions, but technically they are merely US sanctions which have the legal weight of say Togo's sanctions on the high seas. This is an ongoing dispute between these two countries. What the article didn't mention was that the US has pirated (ahem) 'commandeered' Iranian oil tankers as well. Nations which realize this build a strong collective identity which lets them see assistance of their fellow man as assistance of self, bypassing the innate 'why my money spent on him' complaint. Others having children is what keeps the country running in your old age when you have none keeping your country's Western border safe helps you even if your state is miles away in the East ensuring children are all educated and fed helps even if you will have none ensuring your population is employed will help even if you don't need to work anymore ensuring others can take public transit along your route helps even if you must drive treating people who can't pay in emergency rooms helps you even if you will be forced to pay. There are many things that have positive externalities. Something people often make a mistake with is positive externalities. When the benefits accrue so much to America, it is in America's interests to intervene on behalf of everyone - even those who won't pay. It is in this nation's interests to preserve global sea trade. Pax Americana has yielded the American people great benefits. The US military enforces sea peace across the globe.

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